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authorChaitanya Kulkarni <chaitanya.kulkarni@wdc.com>2019-02-21 07:13:34 +0300
committerChristoph Hellwig <hch@lst.de>2019-02-21 16:39:20 +0300
commit34e08191b146a363d72be1a488d55ecdc01a5c7d (patch)
tree18e2e1a1dc21881e727c4309121e0b1a9bce043d /drivers/nvme
parent77141dc6ceffdbf4dd3470911c838309e23cd55c (diff)
downloadlinux-34e08191b146a363d72be1a488d55ecdc01a5c7d.tar.xz
nvme-rdma: use nr_phys_segments when map rq to sgl
Use blk_rq_nr_phys_segments() instead of blk_rq_payload_bytes() to check if a command contains data to be mapped. This fixes the case where a struct request contains LBAs, but it has no payload, such as Write Zeroes support. Fixes: 6e02318eaea5 ("nvme: add support for the Write Zeroes command") Reported-by: Ming Lei <tom.leiming@gmail.com> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Tested-by: Ming Lei <tom.leiming@gmail.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/nvme')
-rw-r--r--drivers/nvme/host/rdma.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 7c0d29185249..11a5ecae78c8 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -1142,7 +1142,7 @@ static void nvme_rdma_unmap_data(struct nvme_rdma_queue *queue,
struct nvme_rdma_device *dev = queue->device;
struct ib_device *ibdev = dev->dev;
- if (!blk_rq_payload_bytes(rq))
+ if (!blk_rq_nr_phys_segments(rq))
return;
if (req->mr) {
@@ -1265,7 +1265,7 @@ static int nvme_rdma_map_data(struct nvme_rdma_queue *queue,
c->common.flags |= NVME_CMD_SGL_METABUF;
- if (!blk_rq_payload_bytes(rq))
+ if (!blk_rq_nr_phys_segments(rq))
return nvme_rdma_set_sg_null(c);
req->sg_table.sgl = req->first_sgl;